plot ext grid as a symbol instead of a patch

pandapower/plotting/simple_plot.py

@@ -9,7 +9,7 @@
 from pandapower.plotting.plotting_toolbox import get_collection_sizes
 from pandapower.plotting.collections import create_bus_collection, create_line_collection, \
     create_trafo_collection, create_trafo3w_collection, \
-    create_line_switch_collection, draw_collections, create_bus_bus_switch_collection, create_sgen_collection, \
+    create_line_switch_collection, draw_collections, create_bus_bus_switch_collection, create_ext_grid_collection, create_sgen_collection, \
     create_gen_collection, create_load_collection
 from pandapower.plotting.generic_geodata import create_generic_coordinates
 
@@ -130,8 +130,9 @@ def simple_plot(net, respect_switches=False, line_width=1.0, bus_size=1.0, ext_g
     # create ext_grid collections
     eg_buses_with_geo_coordinates = set(net.ext_grid.bus.values) & set(net.bus_geodata.index)
     if len(eg_buses_with_geo_coordinates) > 0:
-        sc = create_bus_collection(net, eg_buses_with_geo_coordinates, patch_type="rect",
-                                   size=ext_grid_size, color=ext_grid_color, zorder=11)
+        sc = create_ext_grid_collection(net, size=ext_grid_size, orientation=0, ext_grids=eg_buses_with_geo_coordinates)
+        # sc = create_bus_collection(net, eg_buses_with_geo_coordinates, patch_type="rect",
+        #                            size=ext_grid_size, color=ext_grid_color, zorder=11)
         collections.append(sc)
 
     # create trafo collection if trafo is available
@@ -159,7 +160,7 @@ def simple_plot(net, respect_switches=False, line_width=1.0, bus_size=1.0, ext_g
         collections.append(sc)
 
     if plot_sgens and len(net.sgen):
-        sgc = create_sgen_collection(net, size=sgen_size)
+        sgc = create_sgen_collection(net, size=sgen_size, orientation=0)
         collections.append(sgc)
     if plot_gens and len(net.gen):
         gc = create_gen_collection(net, size=gen_size)